package com.atguigu.lease.common.jwt;

import com.atguigu.lease.common.advice.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import io.jsonwebtoken.*;
import io.jsonwebtoken.security.Keys;

import javax.crypto.SecretKey;
import java.util.Date;

public class JwtUtil {
    private static long tokenExpiration = 6 * 60 * 60 * 1000L;
    private static SecretKey tokenSignKey = Keys.hmacShaKeyFor("M0PKKI6pYGVWWfDZw90a0lTpGYX1d4AQ".getBytes());

    public static String createToken(Long userId, String username) {
        String token = Jwts.builder()
                .setSubject("USER_INFO")
                .setExpiration(new Date(System.currentTimeMillis() + tokenExpiration))
                .claim("userId", userId)
                .claim("username", username)
                .signWith(tokenSignKey)
                .compressWith(CompressionCodecs.GZIP)
                .compact();
        return token;

    }
    public static Claims parseToken(String token) {
        try {
            Jws<Claims> claimsJws = Jwts.parserBuilder()
                    .setSigningKey(tokenSignKey)
                    .build().parseClaimsJws(token);
                    return claimsJws.getBody();
        }catch (ExpiredJwtException  e){
            throw new LeaseException(ResultCodeEnum.TOKEN_EXPIRED);
        }
        catch (JwtException  e){
            throw new LeaseException(ResultCodeEnum.TOKEN_INVALID);
        }
    }
}
